[tex]\huge \sf ༆ Answer ༄[/tex]
Let's solve ~
[tex]\qquad \sf \dashrightarrow \: {a}^{2} - 4a[/tex]
Now, substitute a for 10
[tex]\qquad \sf \dashrightarrow \: ( {10}^{2} ) - (4 \times 10)[/tex]
[tex]\qquad \sf \dashrightarrow \: 100 - 40[/tex]
[tex]\qquad \sf \dashrightarrow \: 60[/tex]
Question: Work out the value of a² - 4a when (a = 10)
To find: Value of a² - 4a = ?
Solution:
The hint provided us to solve the question is that the value of a tends to 10 i.e (a = 10) so just we have to replace the value of a = 10 in the given equation.
Substituting value of a = 10 in eqn,
[tex]\mapsto\sf{ {a}^{2} - 4a}[/tex]
[tex]\mapsto\sf{( {10}^{2} ) - 4(10)}[/tex]
[tex]\mapsto\sf{100 - 4(10)}[/tex]
[tex]\mapsto\sf{100 - 40}[/tex]
[tex]\mapsto\sf{60}[/tex]
